let option = {
    legend: {},
    tooltip: {},
    dataset: {
      source: [
        ['product', '2012', '2013', '2014', '2015'],
        ['Matcha Latte', 41.1, 30.4, 65.1, 53.3],
        ['Milk Tea', 86.5, 92.1, 85.7, 83.1],
        ['Cheese Cocoa', 24.1, 67.2, 79.5, 86.4]
      ]
    },
    xAxis: [
      { type: 'category', gridIndex: 0 },
      { type: 'category', gridIndex: 1 }
    ],
    yAxis: [{ gridIndex: 0 }, { gridIndex: 1 }],
    grid: [{ bottom: '55%' }, { top: '55%' }],
    series: [
      // 这几个系列会出现在第一个直角坐标系中，每个系列对应到 dataset 的每一行。
      { type: 'bar', seriesLayoutBy: 'row', xAxisIndex: 0, yAxisIndex: 0 },
      { type: 'bar', seriesLayoutBy: 'row', xAxisIndex: 0, yAxisIndex: 0 },
      { type: 'bar', seriesLayoutBy: 'row', xAxisIndex: 0, yAxisIndex: 0 },
      // 这几个系列会出现在第二个直角坐标系中，每个系列对应到 dataset 的每一列。
      { type: 'bar', seriesLayoutBy: 'column', xAxisIndex: 1, yAxisIndex: 1 },
      { type: 'bar', seriesLayoutBy: 'column', xAxisIndex: 1, yAxisIndex: 1 },
      { type: 'bar', seriesLayoutBy: 'column', xAxisIndex: 1, yAxisIndex: 1 },
      { type: 'bar', seriesLayoutBy: 'column', xAxisIndex: 1, yAxisIndex: 1 }
    ]
  };
  export default option;